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  1. Hadoop Common
  2. HADOOP-7878

Regression HADOOP-7777 switch changes break HDFS tests when the isSingleSwitch() predicate is used

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Details

    • Bug
    • Status: Closed
    • Minor
    • Resolution: Fixed
    • 0.23.0, 0.24.0
    • 0.23.1
    • util

    Description

      This doesn't show up until you apply the HDFS-2492 patch, but the attempt to make the StaticMapping topology clever by deciding if it is single rack or multi rack based on its rack->node mapping breaks the HDFS TestBlocksWithNotEnoughRacks test. Why? Because the racks go in after the switch topology is cached by the BlockManager, which assumes the system is always single-switch.

      Fix: default to assuming multi-switch; remove the intelligence, add a setter for anyone who really wants to simulate single-switch racks.

      Test: verify that a newly created simple mapping is multi switch

      Attachments

        1. HADOOP-7878.patch
          3 kB
          Steve Loughran
        2. HADOOP-7878.patch
          3 kB
          Steve Loughran

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            stevel@apache.org Steve Loughran
            stevel@apache.org Steve Loughran
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